| emissary | 1. Exploring; spying. 2. <anatomy> Applied to the veins which pass out of the cranium through apertures in its walls. Source: Websters Dictionary (01 Mar 1998) |
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| emissary sphenoidal foramen | <anatomy> A minute inconstant foramen in the greater wing of the sphenoid bone, anterior and medial to the foramen ovale, transmitting a small emissary vein from the cavernous sinus. Synonym: emissary sphenoidal foramen, venous foramen, Vesalius' foramen. (05 Mar 2000) |
| emissary vein | <anatomy, vein> One of the channels of communication between the venous sinuses of the dura mater and the veins of the diploe and the scalp. See: condylar emissary vein, mastoid emissary vein, occipital emissary vein, parietal emissary vein. Synonym: vena emissaria, emissarium, emissary. (05 Mar 2000) |
| emission | 1. The act of sending or throwing out; the act of sending forth or putting into circulation; issue; as, the emission of light from the sun; the emission of heat from a fire; the emission of bank notes. 2. That which is sent out, issued, or put in circulation at one time; issue; as, the emission was mostly blood. 3. <physics> Emission theory, the theory of Newton, regarding light as consisting of emitted particles or corpuscles. See Corpuscular theory. Origin: L. Emissio: cf. F. Emission. Source: Websters Dictionary (01 Mar 1998) |
| emission electron | <physics>? A beta particle resulting from radioactive decay. (05 Mar 2000) |
| emission offset | <chest medicine> A reduction in the air pollution emissions of existing sources to compensate for emissions from new sources. (05 Dec 1998) |
| emission standard | This regulatory value is a quantitative limit on the emission or discharge of a potentially toxic substance from a source. The simplest form for regulatory purposes is a uniform emission standard (UES) where the same limit is placed on all emissions of a particular contaminant. (09 Oct 1997) |
| emission-computed tomography | <radiology> Tomography using emissions from radionuclides and a computer algorithm to reconstruct the image. (20 Jun 2000) |
| emissivity | <physics> The giving off of heat rays; a perfect black body has an emissivity of 1, a highly polished metallic surface may have an emissivity as low as 0.02. (05 Mar 2000) |
| emissory | 1. Exploring; spying. 2. <anatomy> Applied to the veins which pass out of the cranium through apertures in its walls. Source: Websters Dictionary (01 Mar 1998) |
| EMIT | <abbreviation> Enzyme-multiplied immunoassay technique. (05 Mar 2000) |
| emitter | <physics, radiobiology> A radionuclide whose decay is accompanied by the emission of beta particles, most commonly negatively charged electrons. Many isotopes used in biology, such as 3H, 14C, 35S and 32P are pure beta emitters. (18 Nov 1997) |